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How to find 1st Purchase date who made 2nd purchase within 30 days?

By : Ga Hsu
Date : July 30 2020, 06:00 AM
fixed the issue. Will look into that further You can use window functions to get the first purchase and then count the number of purchases in the first 30 days:
code :
select distinct customer_id, first_purchase_date
from (select t.*,
             min(purchase_date) over (partition by customer_id) as first_purchase_date
      from t
     ) t
where purchase_date <= first_purchase_date + interval '30 day' and
      purchase_date > first_purchase_date;
select customer_id, first_purchase_date, count(*)
from (select t.*,
             min(purchase_date) over (partition by customer_id) as first_purchase_date
      from t
     ) t
where purchase_date <= first_purchase_date + interval '30 day' 
group by customer_id, first_purchase_date
having count(*) > 1;

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In App purchase response which purchase time, convert this timestamp value to date format?

By : Remps Monto
Date : March 29 2020, 07:55 AM
To fix the issue you can do You are trying to parse a timestamp with SimpleDateFormat using an incorrect format string "MMddyyHHmmss". The timestamp value returned is expressed in "milliseconds since the epoch (Jan 1, 1970)". Parse the string to its long value and create a Date object directly from that:
code :
Date date = new Date(Long.parseLong(timestampString)); 

Days since last purchase postgres (for each purchase)

By : Mike Africa
Date : March 29 2020, 07:55 AM
This might help you You should use lag() function:
code :
select *, 
    lag(order_date) over (partition by customer_id order by order_date) 
    as prior_order_date
from transactions
order by order_id
select *, 
    order_date- lag(order_date) over (partition by customer_id order by order_date)
    as days_since_last_order
from transactions
order by order_id

How to check if transaction is made with test account purchase or with real account purchase?

By : Spencer Claxton
Date : March 29 2020, 07:55 AM
I wish this helpful for you Yes, you can check that from the purchaseType field of the Google's Purchases.subscriptions API response refer.

In App Purchase - detect whether user has already made that purchase

By : user2907053
Date : March 29 2020, 07:55 AM
may help you . You need to check callback of updatedTransactions for the needed productIdentifier and it's state purchased/restored
code :
func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {
    for transaction in transactions {
        if transaction.payment.productIdentifier == "someId" && ( transaction.transactionState == .purchased || transaction.transactionState == .restored ) {
            // purchased / resorted

How to handle Purchase States with Purchase History Record in new Google In App Purchase

By : user3213296
Date : March 29 2020, 07:55 AM
To fix the issue you can do As far as I understand, Using "queryPurchaseHistoryAsync()" to restore purchases is wrong. It is not exists for this. To restore old purchases "queryPurchases()" method should be used.
the documentation's statements about cache is confusing, google play app cache related to account is updating for all devices.
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